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Liu Y, Su X, Liu H, Zhu G, Ge G, Wang Y, Zhou P, Zhou Q. Construction of eco-friendly dual carbon dots ratiometric fluorescence probe for highly selective and efficient sensing mercury ion. J Environ Sci (China) 2025; 148:1-12. [PMID: 39095148 DOI: 10.1016/j.jes.2024.01.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/08/2024] [Accepted: 01/09/2024] [Indexed: 08/04/2024]
Abstract
In present work, blue carbon dots (b-CDs) were derived from ammonium citrate and guanidine hydrochloride, and red carbon dots (r-CDs) were stemmed from malonate, ethylenediamine and meso‑tetra (4-carboxyphenyl) porphin based on facile hydrothermal method. Eco-friendly ratiometric fluorescence probe was innovatively constructed to effectively measure Hg2+ utilizing b-CDs and r-CDs. The developed probe displayed two typical emission peaks at 450 nm from b-CDs and 650 nm from r-CDs under the excitation at 360 nm. Mercury ion has strong quenching effect on the fluorescence intensity at 450 nm due to the electron transfer process and the fluorescence change at 450 nm was used as the response signal, whereas the fluorescence intensity at 650 nm kept unchangeable which resulted from the chemical inertness between Hg2+ and r-CDs, serving as the reference signal in the sensing system. Under optimal circumstances, this probe exhibited an excellent linearity between the fluorescence response values of ΔF450/F650 and Hg2+ concentrations over range of 0.01-10 µmol/L, and the limit of detection was down to 5.3 nmol/L. Furthermore, this probe was successfully employed for sensing Hg2+ in practical environmental water samples with satisfied recoveries of 98.5%-105.0%. The constructed ratiometric fluorescent probe provided a rapid, environmental-friendly, reliable, and efficient platform for measuring trace Hg2+ in environmental field.
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Affiliation(s)
- Yongli Liu
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China.
| | - Xiaoyan Su
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Huanjia Liu
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Guifen Zhu
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Guobei Ge
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Yuxin Wang
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Penghui Zhou
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Qingxiang Zhou
- College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China.
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2
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Wu H, Wang Y, Jiang D, Chen X, Tan J, Xu Z, Lei H, Li X. Simple synthesis of flower-like ZnO@Pt composites for dual-mode colorimetric detecting Hg 2+ with smartphone and UV-vis. Anal Chim Acta 2024; 1311:342732. [PMID: 38816157 DOI: 10.1016/j.aca.2024.342732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 05/15/2024] [Indexed: 06/01/2024]
Abstract
BACKGROUND Mercury is one of the most toxic heavy metal contaminants that can be harmful to human health through the food chain. Recently, the colorimetric detection of heavy metals based on nanozyme catalytic activity has received extensive interest due to the simplicity, signal visibility and suitability for in situ detection. However, the majority of these nanozymes that can be utilized for detecting mercury with high synthesis temperature and complicated synthesis methods, which limited their practical application. RESULTS In this work, flower-like ZnO@Pt composites were simply synthesized at room temperature, the flower-like structure and the high electron mobility of ZnO endow ZnO@Pt with stronger peroxidase-like activity. Consequently, dual-mode (UV-vis and smartphone) colorimetric sensors were designed to detect Hg2+. In UV-vis mode, the Hg2+ concentration linear range was 10-400 nM, and the limit of detection (LOD) was 0.54 nM. In smartphone mode, the Hg2+ concentration linear range was 50-1250 nM, and the LOD was 29.8 nM. A parallel analysis in 3 real water samples was confirmed by ICP-MS, the results showed good correlations (R2 > 0.98), indicating the practical reliability of these sensors. SIGNIFICANCE The novel flower-like ZnO@Pt composites with high stability, catalytic activity and Hg2+ response were simply synthesized at room temperature, simplifying the synthesis steps and reducing costs. The sensitivity of the developed colorimetric sensor in UV-vis mode was 3-145 times higher than that of the similar methods. The colorimetric sensor in smartphone mode broadened the detection range and improved the portability of Hg2+ detection. Thus, the dual-mode (UV-vis and smartphone) colorimetric sensors providing new detection modes for rapid monitoring of Hg2+ in environmental water.
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Affiliation(s)
- Han Wu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Yu Wang
- Guangzhou Institute for Food Inspection, Guangzhou, 511410, China
| | - Duan Jiang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Xiaomin Chen
- Guangzhou Institute for Food Inspection, Guangzhou, 511410, China
| | - Jingping Tan
- Guangzhou Institute for Food Inspection, Guangzhou, 511410, China
| | - Zhenlin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Hongtao Lei
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Xiangmei Li
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, 510642, China.
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3
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Wang Y, Xu G, Zhang X, Yang X, Hou H, Ai W, Zhao L. N- and S-codoped carbon quantum dots for enhancing fluorescence sensing of trace Hg 2. Phys Chem Chem Phys 2023; 25:28230-28240. [PMID: 37823325 DOI: 10.1039/d3cp02924g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
Carbon-quantum-dot-based fluorescence sensing of Hg2+ is a well-known cost-effective tactic with fast response and high sensitivity, while rationally constructing heteroatom-doped carbon quantum dots with improved fluorescence sensing performances through tuning the electronic and chemical structures of the reactive site still remains a challenging project for monitoring trace Hg2+ in aquatic ecosystems to avoid harm resulting from its high toxicity, nonbiodegradabilty and accumulative effects on human health. Herein, intriguing N,S-codoped carbon quantum dots were synthesized via a facile one-step hydrothermal procedure. As an admirable fluorescent probe with plentiful heteroatom-related functional groups, these N,S-codoped carbon quantum dots can exhibit an absolute fluorescence quantum yield as high as 11.6%, excellent solubility and stability over three months, remarkable sensitivity for Hg2+ detection with an attractive detection limit of 0.27 μg L-1 and admirable selectivity for Hg2+ against thirteen other metal ions. Density functional theory calculations reveal that electron-enriched meta-S of the unique graphitic N with homocyclic meta-thiophene sulfur structure can regulate this N site to have more electrons and preferable affinity towards Hg, hence achieving enhanced fluorescence quenching due to greater charge transfer from N to Hg after the coordination interaction. This strategy provides a promising avenue for precisely designing purpose-made quantum dots with the dedicated fluorescence sensing applications.
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Affiliation(s)
- Yujie Wang
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Guoliang Xu
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Xinghe Zhang
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Xiaona Yang
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Hongbo Hou
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Wei Ai
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Liju Zhao
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
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4
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Liu K, Pan M, Zhang Z, Hong L, Xie X, Yang J, Wang S, Wang Z, Song Y, Wang S. Electrochemical sensor applying ZrO2/nitrogen-doped three-dimensional porous carbon nanocomposite for efficient detection of ultra-trace Hg2+ ions. Anal Chim Acta 2022; 1231:340392. [DOI: 10.1016/j.aca.2022.340392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 09/06/2022] [Accepted: 09/11/2022] [Indexed: 11/29/2022]
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5
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Li R, He X, Javed R, Cai J, Cao H, Liu X, Chen Q, Ye D, Zhao H. Switching on-off-on colorimetric sensor based on Fe-N/S-C single-atom nanozyme for ultrasensitive and multimodal detection of Hg 2. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 834:155428. [PMID: 35469883 DOI: 10.1016/j.scitotenv.2022.155428] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 03/28/2022] [Accepted: 04/17/2022] [Indexed: 05/15/2023]
Abstract
Single-atom nanozymes (SAzymes) as a new class of efficient nanozymes have attracted extensive research interest due to their high catalytic activity and specificity. However, it is challenging to develop a novel nanoenzyme with high activity, good stability and reproducibility. In this paper, the nitrogen and sulfur coordinated Fe-N/S-C SAzymes were synthesized using peanuts shells as carbon, nitrogen and sulfur source. It shows high oxidase-like activities due to the doping of S induced geometric and electronic effects, which is further confirmed by density functional theory calculations. The prepared Fe-N/S-C SAzymes with the remarkable oxidase-mimicking activity could oxidize TMB to blue oxTMB, but the GSH can inhibit the oxidation of TMB resulting in blue fading. However, when Hg2+ is added into above system, Hg2+-SH complexes are generated attributed to a high affinity between GSH and Hg2+, ultimately leading to blue recovery. Based on this phenomenon, we constructed a novel "on-off-on" colorimetric sensor for the simultaneous detection of GSH (off) and Hg2+ (on), and the signal is acquired by various modes such as naked eye, UV-Vis spectrometer and smartphone. The colorimetric detection mode based on a smartphone showed a good linear response from 10 to 80 μM for GSH with a detection limit of 3.92 μM, and for Hg2+ with a linear range of 1 nM-10 μM and LOD of 0.17 nM, which is more suitable for routine laboratory applications. More importantly, the proposed colorimetric sensor has been successfully applied to the detection of GSH and Hg2+ in real samples with good analytical performance. This work not only provides a simple and cost-effective method to detect GSH and Hg2+ but also makes a certain contribution to environmental protection.
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Affiliation(s)
- Rui Li
- College of Food Science and Engineering, Key Laboratory of Tropical and Vegetables Quality and Safety for State Market Regulation, Hainan University, Haikou 570228, China
| | - Xiaoting He
- College of Food Science and Engineering, Key Laboratory of Tropical and Vegetables Quality and Safety for State Market Regulation, Hainan University, Haikou 570228, China
| | - Rida Javed
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Jian Cai
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Hongmei Cao
- College of Food Science and Engineering, Key Laboratory of Tropical and Vegetables Quality and Safety for State Market Regulation, Hainan University, Haikou 570228, China; Key Laboratory of Food Nutrition and Functional Food of Hainan Province, 58 Renmin Avenue, Haikou 570228, China.
| | - Xing Liu
- College of Food Science and Engineering, Key Laboratory of Tropical and Vegetables Quality and Safety for State Market Regulation, Hainan University, Haikou 570228, China
| | - Qi Chen
- College of Food Science and Engineering, Key Laboratory of Tropical and Vegetables Quality and Safety for State Market Regulation, Hainan University, Haikou 570228, China
| | - Daixin Ye
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China.
| | - Hongbin Zhao
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China.
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6
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Lv Z, Zhang M, Jin H, Huang Y, Wei M. Screen‐printed electrode‐based homogeneous electrochemical aptasensor for mercury (
II
) based on reduced graphene oxide and exonuclease
III
‐driven cyclic reaction. J CHIN CHEM SOC-TAIP 2022. [DOI: 10.1002/jccs.202200179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zeping Lv
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control Henan University of Technology Zhengzhou People's Republic of China
| | - Mingli Zhang
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control Henan University of Technology Zhengzhou People's Republic of China
| | - Huali Jin
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control Henan University of Technology Zhengzhou People's Republic of China
| | - Yawei Huang
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control Henan University of Technology Zhengzhou People's Republic of China
| | - Min Wei
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control Henan University of Technology Zhengzhou People's Republic of China
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7
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Ultrasensitive determination of mercury by ICP-OES coupled with a vapor generation approach based on solution cathode glow discharge. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.09.107] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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8
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Peng X, Wang Z. Systematic evaluation of advance in application and discharge mechanism of solution electrode glow discharge. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.06.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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9
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Bao H, Peng X, Song Z, Ning Y, Yu Y, Gao Y. Natural mineral assisted photochemical vapor generation for determination of trace inorganic arsenic by inductively coupled plasma mass spectrometry. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106689] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Pohl P, Jamroz P, Greda K, Gorska M, Dzimitrowicz A, Welna M, Szymczycha-Madeja A. Five years of innovations in development of glow discharges generated in contact with liquids for spectrochemical elemental analysis by optical emission spectrometry. Anal Chim Acta 2021; 1169:338399. [PMID: 34088364 DOI: 10.1016/j.aca.2021.338399] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 03/01/2021] [Accepted: 03/01/2021] [Indexed: 01/13/2023]
Abstract
The newest achievements in the field of glow microdischarges generated in contact with a flowing liquid cathode (FLC) and a flowing liquid anode (FLA), used as the excitation sources for optical emission spectrometry (OES), were summarized herein. The design of recently reported discharge systems was compared and comprehensively discussed. A lot of effort was devoted to evaluate the effect of selected operating parameters, i.e., discharge voltage and current, sample flow rate, sample pH, jet-supporting gas flow rate, and discharge gap, on the microplasma stability and the intensity of measurable analytical signals. Furthermore, the influence of chemical modifiers, i.e., organic acids, alcohols, and surfactants, aimed at improving the sensitivity and reducing matrix effects, was referred to as well. Finally, the analytical performance and the application of these promising excitation sources for the elemental analysis of different-matrix samples were presented.
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Affiliation(s)
- Pawel Pohl
- Wroclaw University of Science and Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wyspianskiego 27, 50370 Wroclaw, Poland.
| | - Piotr Jamroz
- Wroclaw University of Science and Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wyspianskiego 27, 50370 Wroclaw, Poland
| | - Krzysztof Greda
- Wroclaw University of Science and Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wyspianskiego 27, 50370 Wroclaw, Poland
| | - Monika Gorska
- Wroclaw University of Science and Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wyspianskiego 27, 50370 Wroclaw, Poland
| | - Anna Dzimitrowicz
- Wroclaw University of Science and Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wyspianskiego 27, 50370 Wroclaw, Poland
| | - Maja Welna
- Wroclaw University of Science and Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wyspianskiego 27, 50370 Wroclaw, Poland
| | - Anna Szymczycha-Madeja
- Wroclaw University of Science and Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wyspianskiego 27, 50370 Wroclaw, Poland
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11
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Pan X, Lin Y, Su Y, Yang J, He L, Deng Y, Hou X, Zheng C. Methanol-Enhanced Liquid Electrode Discharge Microplasma-Induced Vapor Generation of Hg, Cd, and Zn: The Possible Mechanism and Its Application. Anal Chem 2021; 93:8257-8264. [PMID: 34077178 DOI: 10.1021/acs.analchem.1c01091] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Despite increased interest in microplasma-induced vapor generation (μPIVG) over the past several years, applications in real sample analyses remain limited due to their relatively low vapor generation efficiency and ambiguous mechanism. In this work, a novel method using methanol for significantly enhancing the liquid electrode discharge μPIVG efficiency was developed for the simultaneous and sensitive determination of Hg, Cd, and Zn by atomic fluorescence spectrometry (AFS). It is worth noting that the possible enhancement mechanism was investigated via the characterizations of volatile products by AFS, microplasma optical emission spectrometry, online gas chromatography, and gas chromatography-mass spectrometry, which involved the reductive species such as electrons, hydrogen radicals (·H), methyl radicals (·CH3), and other intermediates in the argon plasma adding methanol. Under the optimized conditions, the limits of detection of 0.007, 0.05, and 0.5 μg L-1 were obtained for Hg, Cd, and Zn, respectively, with relative standard deviations of 3.1, 3.7, and 5.2% for these elements, respectively. Vapor generation efficiencies of 90, 83, and 55% were achieved for Hg, Cd, and Zn, respectively, and improved 2.7-, 4.8-, and 7.9-fold, respectively, compared to those obtained in the absence of methanol. The accuracy and practicability of the proposed method were validated by the determination of Hg, Cd, and Zn in a certified reference material (CRM, Lobster hepatopancreas, TORT-3) and crayfish samples collected from three different provinces of China.
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Affiliation(s)
- Xiaomin Pan
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yao Lin
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yubin Su
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Jiahui Yang
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Liangbo He
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yurong Deng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Xiandeng Hou
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China.,Analytical and Test Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Chengbin Zheng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
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12
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Peng X, Zhao M, Yuan M, Wang Z. Solution anode glow discharge optical emission spectrometry: Volatile hydride introduction from the gas jet nozzle cathode for ultrasensitive determination of lead. Talanta 2021; 225:121995. [PMID: 33592742 DOI: 10.1016/j.talanta.2020.121995] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 11/04/2020] [Accepted: 12/07/2020] [Indexed: 10/22/2022]
Abstract
An ultrasensitive method for the determination of Pb was developed by coupling solution anode glow discharge-optical emission spectrometry (SAGD-OES) with hydride generation (HG). Compared to solution cathode glow discharge, the introduction of analytes yielded via HG from the discharge cathode into the microplasma was demonstrated to be easily performed by SAGD in which the gas jet nozzle served as cathode and further enhanced sensitivity for Pb determination was achieved. The susceptibility of SAGD-OES to the matrix-induced interferences in the analysis of real samples was significantly improved owing to the coupling of HG. After a thorough optimization of the HG-SAGD-OES system parameters, the developed system achieved Pb detection limit of 0.061 ng mL-1, with the corresponding relative standard deviation being <2.2% at analyte concentrations of 50 ng mL-1. The potential application of this method was validated by successfully analyzing three certified reference materials (CRMs: GBW07311, GBW07312, and GBW07601a (GSH-1)) and human blood samples.
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Affiliation(s)
- Xiaoxu Peng
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mingyue Zhao
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899, China
| | - Mingli Yuan
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899, China
| | - Zheng Wang
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China.
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